package com.jerry.boot.base.config.shiro;

import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

@Configuration
public class ShiroConfig {
   @Bean
   public ShiroFilterFactoryBean shirFilter(SecurityManager securityManager) {
      System.out.println("ShiroConfiguration.shirFilter()");
      ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
      shiroFilterFactoryBean.setSecurityManager(securityManager);
      //拦截器.
      Map<String,String> filterChainDefinitionMap = new LinkedHashMap<String,String>();
      // 配置不会被拦截的链接 顺序判断，因为前端模板采用了thymeleaf，这里不能直接使用 ("/static/**", "anon")来配置匿名访问，必须配置到每个静态目录
      filterChainDefinitionMap.put("/css/**", "anon");
      filterChainDefinitionMap.put("/fonts/**", "anon");
        filterChainDefinitionMap.put("/img/**", "anon");
        filterChainDefinitionMap.put("/js/**", "anon");
        filterChainDefinitionMap.put("/html/**", "anon");
      //配置退出 过滤器,其中的具体的退出代码Shiro已经替我们实现了
      filterChainDefinitionMap.put("/logout", "logout");
      //<!-- 过滤链定义，从上向下顺序执行，一般将/**放在最为下边 -->:这是一个坑呢，一不小心代码就不好使了;
      //<!-- authc:所有url都必须认证通过才可以访问; anon:所有url都都可以匿名访问-->
      filterChainDefinitionMap.put("/**", "authc");
      // 如果不设置默认会自动寻找Web工程根目录下的"/login.jsp"页面
      shiroFilterFactoryBean.setLoginUrl("/login");
      // 登录成功后要跳转的链接
      shiroFilterFactoryBean.setSuccessUrl("/index");

      //未授权界面;
      shiroFilterFactoryBean.setUnauthorizedUrl("/403");
      shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
      return shiroFilterFactoryBean;
   }

   /**
    * 凭证匹配器
    * （由于我们的密码校验交给Shiro的SimpleAuthenticationInfo进行处理了
    * ）
    * @return
    */
   @Bean
   public HashedCredentialsMatcher hashedCredentialsMatcher(){
      HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
      hashedCredentialsMatcher.setHashAlgorithmName("md5");//散列算法:这里使用MD5算法;
      hashedCredentialsMatcher.setHashIterations(2);//散列的次数，比如散列两次，相当于 md5(md5(""));
      return hashedCredentialsMatcher;
   }

   @Bean
   public MyShiroRealm myShiroRealm(){
      MyShiroRealm myShiroRealm = new MyShiroRealm();
      myShiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());
      return myShiroRealm;
   }


   @Bean
   public SecurityManager securityManager(){
      DefaultWebSecurityManager securityManager =  new DefaultWebSecurityManager();
      securityManager.setRealm(myShiroRealm());
      return securityManager;
   }

   /**
    *  开启shiro aop注解支持.
    *  使用代理方式;所以需要开启代码支持;
    * @param securityManager
    * @return
    */
   @Bean
   public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager){
      AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
      authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
      return authorizationAttributeSourceAdvisor;
   }




   @Bean(name="simpleMappingExceptionResolver")
   public SimpleMappingExceptionResolver
   createSimpleMappingExceptionResolver() {
      SimpleMappingExceptionResolver r = new SimpleMappingExceptionResolver();
      Properties mappings = new Properties();
      mappings.setProperty("DatabaseException", "databaseError");//数据库异常处理
      mappings.setProperty("UnauthorizedException","/user/403");
      r.setExceptionMappings(mappings);  // None by default
      r.setDefaultErrorView("error");    // No default
      r.setExceptionAttribute("exception");     // Default is "exception"
      //r.setWarnLogCategory("example.MvcLogger");     // No default
      return r;
   }
}